GB/T 5581-1985 75波特/180Hz调频音频电报机技术要求和测试方法

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基本信息
标准名称:75波特/180Hz调频音频电报机技术要求和测试方法
英文名称:Specification and measuring method of frequency-modulated voice-frequency telegraph set for a modulation rate of 75 Bauds with channels spaced at 180 Hz
中标分类: 通信、广播 >> 通信设备 >> 数字通信设备
ICS分类:
替代情况:作废;
发布部门:国家标准局
发布日期:1985-01-01
实施日期:1986-07-01
首发日期:1985-11-12
作废日期:2005-10-14
主管部门:信息产业部(通信)
归口单位:信息产业部(通信)
起草单位:邮电部重庆通信设备厂
出版日期:1900-01-01
页数:4页
适用范围

本标准适用于在载波话路上固定安装的75波特、报路间隔180Hz调频音频电报机。

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所属分类: 通信 广播 通信设备 数字通信设备
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【英文标准名称】:StandardGuideforDocumentingaGround-WaterModelingCode
【原文标准名称】:地下水模型规程文件化的标准指南
【标准号】:ASTMD6171-1997(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:computercode;documentation;ground-watermodeling;Codedevelopment;Computermodel;Documents/documentation--waterapplications;Fieldinvestigations;Ground-watermodel;Software--groundwateranalysisapplications
【摘要】:Ground-watermodelinghasbecomeanimportantmethodologyinsupportoftheplanninganddecision-makingprocessesinvolvedinground-watermanagement.Ground-watermodelsprovideananalyticalframeworkforobtaininganunderstandingofthemechanismsandcontrolsofground-watersystemsandtheprocessesthatinfluencetheirquality,especiallythosecausedbyhumaninterventioninsuchsystems.Increasingly,modelsareanintegralpartofwaterresourcesassessment,protection,andrestorationstudiesandprovideessentialandcost-effectivesupportforplanningandscreeningofalternativepolicies,regulations,andengineeringdesignsaffectingground-water(1).Successfulground-watermanagementrequiresthatdecisionsbebasedontheuseoftechnicallyandscientificallysoundmethodsfordatacollection,informationprocessing,andinterpretation,andthatthesemethodsareproperlyintegrated.Ascomputercodesareessentialbuildingblocksofmodeling-basedmanagement,itiscrucialthatbeforesuchcodesareusedasplanninganddecision-makingtools,theirperformancecharacteristicsareestablishedandtheirtheoreticalfoundation,capabilities,andusedocumented.Goodcodedocumentationensuresscientificrigorandimplementationalqualityinthedevelopmentofacode(2).Completeandwell-writtendocumentationshortensthelearningcurvefornewusers,providesanswerstoquestionsfromprojectmanagers,andsupportsefficientcodeselection.Well-structuredandindexeddocumentationprovidesrapidanswersforinitiatedusers.Thisguideisintendedtoencouragecomprehensiveandconsistentdocumentationofaground-watermodelingcode.Earliersurveysofcomputermodelsandassessmentofspecificmodelsindicatethatthedocumentsthataresupposedtodescribeandexplainthesemodelsandtheirusearelackingindetail,inconsistentintheircontents,incompletewithrespecttouserinstructions,inefficientwithrespecttoindexingandstructure,andoftendifficulttoobtain(3).Thisstillappliestothedocumentationofmanyoftheground-watermodelingprogramsrecentlyreleasedorfrequentlyused(4).1.1Thisguidecoverssuggestedcomponentsofthedocumentationofaground-watermodelingcode.Documentationofaground-watermodelingcodeconsistsoftextualandgraphicalinformationrecordedduringitsdesign,development,andmaintenanceregardingitscapabilities,developmenthistory,theoreticalfoundation,operation,andverification.Itistheprincipalinstrumentforthoseinvolvedinitsdevelopmentanduse,suchascodedevelopmentandmaintenancestaff,networkmanagers,codeusers,andprojectmanagers,tocommunicateregardingallaspectsofthesoftware.1.2Thisguidepresentsthemajorstepsinpreparingthedocumentationofaground-watermodelingcode.Itdiscussesthevariousdocumentationaudiencesandaddressestheroleofprinteddocumentationversusdocumentationinelectronicform.1.3Thisguideisoneofaseriesofguidesonground-watermodelingcodesandtheirapplications,suchasGuidesD5447,D5490,D5609,D5610,D5611,andD5718.1.4Thisguideisnotintendedtobeallinclusive.Ifoffersaseriesofoptionsandconsiderations,but......
【中国标准分类号】:D14
【国际标准分类号】:35_080
【页数】:4P.;A4
【正文语种】:英语


基本信息
标准名称:通信电源和空调集中监控系统技术要求(暂行规定)
替代情况:被YD/T 1363.1-2005代替 被YD/T 1363.2-2005代替 被YD/T 1363.3-2005代替 被YD/T 1363.4-2005代替
发布日期:1996-01-01
实施日期:1996-07-11
首发日期:
作废日期:2005-11-01
起草单位:邮电部设计院
出版日期:
页数:96页
适用范围

主题内容:它规定了通信电源和空调集中监控系统的系统组成、网络结构、监控内容、系统管理、通信协议等。适用范围:用于各类通信局(站)单独设置的通信电源和空调集中监控系统及监控系统网络

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所属分类: 通信 广播 邮政 邮政编码 邮政枢纽内部工艺流程